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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"van der Waals materials"”.
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Magnetism in Two-Dimensional van der Waals Materials
Layered van der Waals crystals are a rich proving ground for exploring electronic behavior confined to two dimensions. Since the discovery of graphene in 2004, a large family of crystals has been isolated in the ultrathin limit, hosting a range of different properties, including semiconductors, …
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Control of Nonlinear Properties of van der Waals Materials
<p>Van der Waals materials are a broad class of materials that exhibit unique optoelectronic properties. They provide a rich playground for which they can be integrated into current on-chip devices due to their nanometer-scale size, and be utilized for studying fundamental physics. Strong coupling …
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Nano optics With Phonon-Polaritons in Van der Waals Materials
Tesis doctoral con mención internacional
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Reconfigurable strain engineering of atomically-thin van der Waals materials
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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High-pressure studies of atomically-thin van der Waals materials
Two-dimensional (2D) materials and Moiré superlattices formed by certain stacking configurations of 2D crystals, represent a new frontier for quantum matter research due the emergent properties associated to their reduced dimensionality and tunability. To glean insight into the physics of these …
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Tip-based advanced characterizations of van der Waals materials for enhanced functionality
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Thermodynamic and tunneling measurements of van der Waals heterostructures
… spectrum. Both techniques were applied to van der Waals materials, a class of crystals composed of layered atomic sheets with weak interplane bonding which permits the isolation of single and few-layer sheets that can be manually assembled into heterostructures. Capacitance measurements …
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Field-effect transistors on monolayer transition metal dichalcogenides synthesized by chemical vapor deposition
… by Geim et al. in 2004, two-dimensional van der Waals materials (2DMs) have attracted wide research interest for their unique electronic, optical, and mechanical properties. These materials consist of stacked, atomically-thin sheets bonded by van der Waals forces. 2DMs are suited for …
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Characterization of nanostructured hexagonal boron nitride patterned via high-resolution ion beam lithography
… of polariton research in two-dimensional (2D) materials focuses on pushing the limits of patterning 2D materials into nanoresonators and other nanophotonic structures that manipulate highly confined polaritons for technologically relevant near-IR and mid-IR applications. Furthermore, tuning the …
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Hybrid Two Dimensional Quantum Devices
… material systems involving two dimensional (2D) materials and phenomena along with the development of a small, hermetically sealed cell. The hermetic cell is designed to assist with analyzing sensitive 2D materials outside of an inert environment. When working with van der Waals materials that …
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Ultrafast spatiotemporal dynamics of photoexcitations in two-dimensional semiconductors
This thesis focuses on two families of Van der Waals materials: the transition metal dichalcogenides and the group IV monochalcogenides. First, we explore the spatio-temporal dynamics of photo-excited species in monolayer transition metal dichalcogenides. Using pump-probe spectroscopy, and a range …
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Epitaxial growth and plasmonic coupling in topological insulator heterostructures
… Bi2Se3, Bi2Te3, and Sb2Te3 is dominated by van der Waals epitaxy. To produce high quality thin film for optical application, the growth of TI must be optimized to fit the needs on various substrates. The first part of this dissertation discusses the general growth strategies that are …
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Optics and Optoelectronics of Atomically Thin Magnets and Semiconductors
Since the discovery of graphene, layered van der Waals materials have become one of the most active subjects of study. The array of available atomically thin materials has expanded rapidly beyond graphene, encompassing a wide variety of physical properties ranging from insulators like hexagonal …
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Emergent Critical Phases in Strongly Correlated Low-Dimensional Magnetic Systems
… and intriguing questions regarding the underlying physics. Understanding these non-trivial phenomena demands a combined theoretical and experimental effort. While the exact mechanisms remain under ongoing investigations, it is widely acknowledged that emergent phenomena often arise in the …
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Design and experimental observation of topological states in photonic metasurfaces
… and strong coupling with novel low- dimensional materials. A very convenient integration with on-chip optical devices and also with quantum dots or monolayers of van der Waals materials promise even brighter future for photonic topological insulators as a useful platform for innovative photonic …
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Static and Dynamic Disorder in Emerging Optoelectronic Materials
… in semiconductor research and manufacturing. Advances in the synthesis of pure semiconductors of first and second generation including silicon, germanium and gallium arsenide has not only opened doors to novel electronic technologies but also facilitated the design and manufacturing of so-called …
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Interfacing spin-based quantum sensors with complex systems
… properties are investigated with second order intensity correlation measurements and an optical level structure is proposed to provide a brand new understanding of this novel quantum sensing platform. This provides a basis for tackling the issues facing nanodiamond.
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The Interplay of Magnetism and Topology in Topological Insulators
… to investigate both topology and magnetism in van der Waals materials without suffering from many of the shortcomings of magnetically doped TIs or TI/magnetic insulator heterostructures. Furthermore, the antiferromagnetic coupling between layers gives rise to interesting layer dependent …
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Strain superlattice effects on the electronic properties of graphene
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Surface instabilities and interfacial phenomena for nanomanufacturing at the atomically-thin limit
Two-dimensional (2D) layered materials, exemplified by the prototypical graphene, have been intensively studied for their diverse material properties and superlative mechanical strength. Due to their atomically-thin nature, weak basal plane van der Waals interactions, and vanishing bending …